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Moat or Bloat

Calculator App

Calculator app with theme toggle, responsive design, and error handling

Web app Rated 7 Oct 2026Dormant

Link
roobiwebdev.github.io/Day-52-Calculator-App
Built by
Dev Nerd

Bloat

88/500

Where it landed on the scale

Bloat
0
Float
300
Moat
400

Summary

This is a working front-end practice project, a Frontend Mentor-style calculator with theme toggle, built as part of a learning challenge. It has no payments, backend, or clear target customer, and it is easy to rebuild. It has had no updates for over 600 days.

Bloat · Not much here works or looks likely to last, yet.

Breakdown

Five measures, 100 points each. Open the receipts under any of them to see the posts and pages behind the points.

Viability

Is there a real problem, someone who would pay, and a market this builder can actually reach?

A learning exercise without a real user problem or payment path; calculators are abundant and free.

8/100

Rubric 0–20No clear problem or user. A toy, a practice clone, or a solution looking for a problem.

Receipts (2)

  1. The creator frames it as a day-52 project in a #100DaysChallenge, which makes it a practice piece rather than a product.

    “#Day52 of #100DaysChallenge Good Evening Everyone 💤 I just finished an amazing Calculator App using #HTML, #CSS, and #JavaScript! 🎉 Highlights: Theme Toggle: Switch up the vibe with different themes! Responsive Design: Fits any screen, big or small📱💻 Button Interactions: Smooth and slick, just the way we like it. ⚡️ Error Handling: It’s got your back with proper error messages.😎 I'm”

    Post · @DevNerd0 · 9 Nov 2024 · open on Telegram (opens in a new tab)

  2. The live page is only a calculator UI with no pricing, accounts, or payment hooks.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

Moat

What stops someone copying it?

A standard calculator that anyone here could rebuild in an afternoon; nothing defends it.

3/100

Rubric 0–20A thin wrapper or a clone that anyone here could rebuild in a weekend.

Receipts (2)

  1. Page text shows only standard calculator keys and a theme switch, nothing proprietary.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  2. The creator rebuilt the same calculator in React/TypeScript, which shows how replicable it is.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Momentum

Did the updates keep coming?

It was shipped across about three months as part of a daily challenge and has been silent for over 600 days since January 2025.

10/100

  • Sustained shipping5/60

    Worked on across 3 months.

  • Consistency5/40

    Updates in 2 of 3 months.

  • Quiet

    No update for 636 days — scaled to 20%.

Receipts (2)

  1. Earliest post about it.

    “Day 36 of #100DaysChallenge Good morning, folks! ☀️ Today’s project is an amazing one. Project Name: Age Calculator App This app allows users to input their birth date and instantly calculates their age in years, months, and days. It’s clean, simple, and effective. Additionally, it features error states to handle invalid inputs gracefully and animations when displaying age calculations. Techno”

    Post · @DevNerd0 · 21 Oct 2024 · open on Telegram (opens in a new tab)

  2. Most recent post about it.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Infrastructure

Does a real, working product exist?

A real, live calculator exists with theme toggle and error handling, but it is a thin static front-end with no backend, accounts, or docs.

52/100

  • It's live20/20

    https://roobiwebdev.github.io/Day-52-Calculator-App/ responded when checked.

  • HTTPS5/5

    Served over HTTPS.

  • Real product25/35

    The calculator works and is live, with theme toggle and error handling, but it is a single-purpose, thin front-end with no backend.

  • Own home0/10

    Only on a free subdomain or link-in-bio page.

  • Maintained0/15

    Last sign of shipping 2025-01-08.

  • Operations2/15

    Only a static page on free hosting, plus a code repo; no accounts, backend, docs, or status page.

Receipts (5)

  1. https://roobiwebdev.github.io/Day-52-Calculator-App/ responded when checked.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  2. The deployed page loads with a full calculator keypad (digits, operators, DEL, RESET, =) and a theme control.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  3. The post describes theme toggle, responsive layout, and error handling.

    “#Day52 of #100DaysChallenge Good Evening Everyone 💤 I just finished an amazing Calculator App using #HTML, #CSS, and #JavaScript! 🎉 Highlights: Theme Toggle: Switch up the vibe with different themes! Responsive Design: Fits any screen, big or small📱💻 Button Interactions: Smooth and slick, just the way we like it. ⚡️ Error Handling: It’s got your back with proper error messages.😎 I'm”

    Post · @DevNerd0 · 9 Nov 2024 · open on Telegram (opens in a new tab)

  4. Crawler facts show no accounts, no status page, and free hosting.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  5. A second version was deployed on Vercel, which is the only extra platform.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Sustainability

Is it being set up to last?

It has no payments, pricing, privacy or terms pages, or support contact, and it is a free-subdomain practice project with no path to sustaining itself.

15/100

  • Distribution12/30

    A site on a free subdomain.

  • Payments0/15

    No payment provider found.

  • Pricing0/10

    No pricing found on the site.

  • Revenue0/5

    No mention of customers, revenue, or pricing.

  • Privacy policy0/7

    No privacy policy found.

  • Terms0/5

    No terms of service found.

  • Support0/8

    No support contact found.

  • Commitment3/20

    The creator posted on a steady daily-challenge cadence for a few months, but no team, roadmap, or dedicated community exists for this project, and activity stopped.

Receipts (4)

  1. A site on a free subdomain.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  2. No payments, pricing, or prices were found on the page.

    Checked 7 Oct 2026 · roobiwebdev.github.io/Day-52-Calculator-App (opens in a new tab)

  3. The Day 76 post shows continued challenge participation in Jan 2025, after which nothing appears.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

  4. Part of a numbered daily challenge series rather than a project-specific roadmap.

    “Day 36 of #100DaysChallenge Good morning, folks! ☀️ Today’s project is an amazing one. Project Name: Age Calculator App This app allows users to input their birth date and instantly calculates their age in years, months, and days. It’s clean, simple, and effective. Additionally, it features error states to handle invalid inputs gracefully and animations when displaying age calculations. Techno”

    Post · @DevNerd0 · 21 Oct 2024 · open on Telegram (opens in a new tab)